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Linux/sound/soc/sh/sh7760-ac97.c

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  1 /*
  2  * Generic AC97 sound support for SH7760
  3  *
  4  * (c) 2007 Manuel Lauss
  5  *
  6  * Licensed under the GPLv2.
  7  */
  8 
  9 #include <linux/module.h>
 10 #include <linux/moduleparam.h>
 11 #include <linux/platform_device.h>
 12 #include <sound/core.h>
 13 #include <sound/pcm.h>
 14 #include <sound/soc.h>
 15 #include <asm/io.h>
 16 
 17 #define IPSEL 0xFE400034
 18 
 19 static struct snd_soc_dai_link sh7760_ac97_dai = {
 20         .name = "AC97",
 21         .stream_name = "AC97 HiFi",
 22         .cpu_dai_name = "hac-dai.0",    /* HAC0 */
 23         .codec_dai_name = "ac97-hifi",
 24         .platform_name = "sh7760-pcm-audio",
 25         .codec_name = "ac97-codec",
 26         .ops = NULL,
 27 };
 28 
 29 static struct snd_soc_card sh7760_ac97_soc_machine  = {
 30         .name = "SH7760 AC97",
 31         .owner = THIS_MODULE,
 32         .dai_link = &sh7760_ac97_dai,
 33         .num_links = 1,
 34 };
 35 
 36 static struct platform_device *sh7760_ac97_snd_device;
 37 
 38 static int __init sh7760_ac97_init(void)
 39 {
 40         int ret;
 41         unsigned short ipsel;
 42 
 43         /* enable both AC97 controllers in pinmux reg */
 44         ipsel = __raw_readw(IPSEL);
 45         __raw_writew(ipsel | (3 << 10), IPSEL);
 46 
 47         ret = -ENOMEM;
 48         sh7760_ac97_snd_device = platform_device_alloc("soc-audio", -1);
 49         if (!sh7760_ac97_snd_device)
 50                 goto out;
 51 
 52         platform_set_drvdata(sh7760_ac97_snd_device,
 53                              &sh7760_ac97_soc_machine);
 54         ret = platform_device_add(sh7760_ac97_snd_device);
 55 
 56         if (ret)
 57                 platform_device_put(sh7760_ac97_snd_device);
 58 
 59 out:
 60         return ret;
 61 }
 62 
 63 static void __exit sh7760_ac97_exit(void)
 64 {
 65         platform_device_unregister(sh7760_ac97_snd_device);
 66 }
 67 
 68 module_init(sh7760_ac97_init);
 69 module_exit(sh7760_ac97_exit);
 70 
 71 MODULE_LICENSE("GPL");
 72 MODULE_DESCRIPTION("Generic SH7760 AC97 sound machine");
 73 MODULE_AUTHOR("Manuel Lauss <mano@roarinelk.homelinux.net>");
 74 

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